This morning I was about to go buy a pregnancy test, then right before I was about to leave for the store, my period started! I usually have late periods and heavy cramps, but this time it was later than usual, cramps for about 4 days prior, and this morning I woke up nauseous and thought I was going to puke off the side of the bed. My period has been heavy all day with cramps (which is normal), but just now I went to the bathroom and when I pulled down my pants, my pad had bright red blood with 2 large pieces of tissue. Then, when I wiped, a HUGE piece of tissue appeared on the toilet paper. I poked at it with a Q-tip and it was definitely a chunk out of my body. It was both dark red and normal red, very thick, and I could stretch it. Also, strings of blood hung from it. 

Some people are saying its a miscarriage and others are saying it's the lining of my vagina! I don't know what to believe! Help!